package mstest.wechat.base.util;

import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.multipart.MultipartFile;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;


/**
 * @author 刘天宇
 * @date 2018年02月01日
 * @time 下午12:00:38 
 * @tags
 */
@Slf4j
public class HttpReqUtil {

	/**
	 * 向指定URL发送GET方法的请求
	 * @param url
	 *            发送请求的URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return URL 所代表远程资源的响应结果
	 */
	public static String sendGet(String url, String param) {
		String result = "";
		BufferedReader in = null;
		try {
			String urlNameString = url + "?" + param;
			URL realUrl = new URL(urlNameString);
			// 打开和URL之间的连接
			URLConnection connection = realUrl.openConnection();
			// 设置通用的请求属性
			connection.setRequestProperty("accept", "*/*");
			connection.setRequestProperty("connection", "Keep-Alive");
			connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 建立实际的连接
			connection.connect();
			// 获取所有响应头字段
			Map<String, List<String>> map = connection.getHeaderFields();
			// 遍历所有的响应头字段
			for (String key : map.keySet()) {
				System.out.println(key + "--->" + map.get(key));
			}
			// 定义 BufferedReader输入流来读取URL的响应
			in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			log.info("发送GET请求出现异常！" + e);
			result = "";
			//e.printStackTrace();
		}
		// 使用finally块来关闭输入流
		finally {
			try {
				if (in != null) {
					in.close();
				}
			} catch (Exception e2) {
				e2.printStackTrace();
			}
		}
		return result;
	}

	/**
	 * 向指定 URL 发送POST方法的请求
	 * 
	 * @param url
	 *            发送请求的 URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return 所代表远程资源的响应结果
	 */
	public static String sendPost(String url, String param) {
		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try {
			URL realUrl = new URL(url);
			// 打开和URL之间的连接
			URLConnection conn = realUrl.openConnection();
			// 设置通用的请求属性
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 发送POST请求必须设置如下两行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			// 获取URLConnection对象对应的输出流
			out = new PrintWriter(conn.getOutputStream());
			// 发送请求参数
			out.print(param);
			// flush输出流的缓冲
			out.flush();
			// 定义BufferedReader输入流来读取URL的响应
			in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("发送 POST 请求出现异常！" + e);
			e.printStackTrace();
		}
		// 使用finally块来关闭输出流、输入流
		finally {
			try {
				if (out != null) {
					out.close();
				}
				if (in != null) {
					in.close();
				}
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		}
		return result;
	}
	
	public static String sendPost(String urlParam, Map<String, Object> params) {
		StringBuffer resultBuffer = null;  
        // 构建请求参数  
        StringBuffer sbParams = new StringBuffer();  
//        if (params != null && params.size() > 0) {
//            for (Entry<String, Object> e : params.entrySet()) {
//                sbParams.append(e.getKey());
//                sbParams.append("=");
//                sbParams.append(e.getValue());
//                sbParams.append("&");
//            }
//        }
		sbParams.append(JSONObject.toJSONString(params));
        HttpURLConnection con = null;  
        OutputStreamWriter osw = null;  
        BufferedReader br = null;  
        // 发送请求  
        try {  
            URL url = new URL(urlParam);  
            con = (HttpURLConnection) url.openConnection();  
            con.setRequestMethod("POST");  
            con.setDoOutput(true);  
            con.setDoInput(true);  
            con.setUseCaches(false);  
            con.setRequestProperty("Content-Type", "application/json");
            if (sbParams != null && sbParams.length() > 0) {  
                osw = new OutputStreamWriter(con.getOutputStream(), "utf-8");  
                osw.write(sbParams.substring(0, sbParams.length() - 1));  
                osw.flush();  
            }  
            // 读取返回内容  
            resultBuffer = new StringBuffer();  
            int contentLength = Integer.parseInt(con.getHeaderField("Content-Length"));  
            if (contentLength > 0) {  
                br = new BufferedReader(new InputStreamReader(con.getInputStream(), "utf-8"));  
                String temp;  
                while ((temp = br.readLine()) != null) {  
                    resultBuffer.append(temp);  
                }  
            }  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        } finally {  
            if (osw != null) {  
                try {  
                    osw.close();  
                } catch (IOException e) {  
                    osw = null;  
                    throw new RuntimeException(e);  
                } finally {  
                    if (con != null) {  
                        con.disconnect();  
                        con = null;  
                    }  
                }  
            }  
            if (br != null) {  
                try {  
                    br.close();  
                } catch (IOException e) {  
                    br = null;  
                    throw new RuntimeException(e);  
                } finally {  
                    if (con != null) {  
                        con.disconnect();  
                        con = null;  
                    }  
                }  
            }  
        }  
  
        return resultBuffer.toString();
	}

	public static Map<String, Object> post(String actionUrl, Map<String, String> params, MultipartFile file) throws IOException {

		String BOUNDARY = java.util.UUID.randomUUID().toString();
		String PREFIX = "--", LINEND = "\r\n";
		String MULTIPART_FROM_DATA = "multipart/form-data";
		String CHARSET = "UTF-8";

		URL uri = new URL(actionUrl);
		HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
		conn.setReadTimeout(5 * 1000); // 缓存的最长时间
		conn.setDoInput(true);// 允许输入
		conn.setDoOutput(true);// 允许输出
		conn.setUseCaches(false); // 不允许使用缓存
		conn.setRequestMethod("POST");
		conn.setRequestProperty("connection", "keep-alive");
		conn.setRequestProperty("Charsert", "UTF-8");
		conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);

		// 首先组拼文本类型的参数
		StringBuilder sb = new StringBuilder();
		for (Entry<String, String> entry : params.entrySet()) {
			sb.append(PREFIX);
			sb.append(BOUNDARY);
			sb.append(LINEND);
			sb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINEND);
			sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);
			sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
			sb.append(LINEND);
			sb.append(entry.getValue());
			sb.append(LINEND);
		}

		DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
		outStream.write(sb.toString().getBytes());
		InputStream in = null;
		// 发送文件数据
		StringBuilder sb1 = new StringBuilder();
		sb1.append(PREFIX);
		sb1.append(BOUNDARY);
		sb1.append(LINEND);
		// name是post中传参的键 filename是文件的名称
		sb1.append("Content-Disposition: form-data; name=\"imgInfo\"; filename=\"" + file.getOriginalFilename() + "\""
				+ LINEND);
		sb1.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINEND);
		sb1.append(LINEND);
		outStream.write(sb1.toString().getBytes());

		InputStream is = file.getInputStream();
		byte[] buffer = new byte[1024];
		int len = 0;
		while ((len = is.read(buffer)) != -1) {
			outStream.write(buffer, 0, len);
		}

		is.close();
		outStream.write(LINEND.getBytes());

		// 请求结束标志
		byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
		outStream.write(end_data);
		outStream.flush();
		// 得到响应码
		int res = conn.getResponseCode();
		if (res == 200) {
			in = conn.getInputStream();
			int ch;
			StringBuilder sb2 = new StringBuilder();
			while ((ch = in.read()) != -1) {
				sb2.append((char) ch);
			}
			return json2Map(sb2.toString());
		}
		outStream.close();
		conn.disconnect();
		
		return null;
	}

	public static String sendMsgPost(String urlParam, Map<String, Object> params) {
		StringBuffer resultBuffer = null;
		params.put("template_id", "");
		params.put("form_id", "");
        // 构建请求参数  
        StringBuffer sbParams = new StringBuffer();  
        if (params != null && params.size() > 0) {  
            for (Entry<String, Object> e : params.entrySet()) {  
                sbParams.append(e.getKey());  
                sbParams.append("=");  
                sbParams.append(e.getValue());  
                sbParams.append("&");  
            }  
        }  
        HttpURLConnection con = null;  
        OutputStreamWriter osw = null;  
        BufferedReader br = null;  
        // 发送请求  
        try {  
            URL url = new URL(urlParam);  
            con = (HttpURLConnection) url.openConnection();  
            con.setRequestMethod("POST");  
            con.setDoOutput(true);  
            con.setDoInput(true);  
            con.setUseCaches(false);  
//            con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
			con.setRequestProperty("Content-Type", "application/json");
			if (sbParams != null && sbParams.length() > 0) {
                osw = new OutputStreamWriter(con.getOutputStream(), "utf-8");  
                osw.write(sbParams.substring(0, sbParams.length() - 1));  
                osw.flush();  
            }  
            // 读取返回内容  
            resultBuffer = new StringBuffer();  
            int contentLength = Integer.parseInt(con.getHeaderField("Content-Length"));  
            if (contentLength > 0) {  
                br = new BufferedReader(new InputStreamReader(con.getInputStream(), "utf-8"));  
                String temp;  
                while ((temp = br.readLine()) != null) {  
                    resultBuffer.append(temp);  
                }  
            }  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        } finally {  
            if (osw != null) {  
                try {  
                    osw.close();  
                } catch (IOException e) {  
                    osw = null;  
                    throw new RuntimeException(e);  
                } finally {  
                    if (con != null) {  
                        con.disconnect();  
                        con = null;  
                    }  
                }  
            }  
            if (br != null) {  
                try {  
                    br.close();  
                } catch (IOException e) {  
                    br = null;  
                    throw new RuntimeException(e);  
                } finally {  
                    if (con != null) {  
                        con.disconnect();  
                        con = null;  
                    }  
                }  
            }  
        }  
  
        return resultBuffer.toString();
	}
	private static Map<String, Object> json2Map(String jsonText) {
		Map<String, Object> objMap = new HashMap<String, Object>();
		ObjectMapper mapper = new ObjectMapper();
		try {
			objMap = mapper.readValue(jsonText, Map.class);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return objMap;
	}

	/**
	 * 发送post请求
	 * @param path
	 * @param obj
	 * @throws JsonProcessingException
	 */
	public static Map<String, Object> post(String path, Object obj) {
		Map<String,Object> result = new HashMap<>();

		ObjectMapper mapper = new ObjectMapper();
		try {
			String input = mapper.writeValueAsString(obj);
			URL url = new URL(path);
			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			conn.setDoOutput(true);
			conn.setRequestMethod("POST");
			conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
			conn.setRequestProperty("Accept", "application/json");

			OutputStream os = conn.getOutputStream();
			os.write(input.getBytes());
			os.flush();
			if (conn.getResponseCode() != 200) {
				throw new RuntimeException("Failed : HTTP error code : "
						+ conn.getResponseCode());
			}
			BufferedReader br = new BufferedReader(new InputStreamReader(
					(conn.getInputStream())));
			String res = "";
			String output;
			System.out.println("Output from Server .... \n");
			while ((output = br.readLine()) != null) {
				res += output;
				System.out.println(output);
			}
			conn.disconnect();

			result = json2Map(res);

			//==================================业务处理==================================

			//打印返回结果
			for (String string : result.keySet()) {
				System.out.println(result.get(string) + "");
			}
		} catch (JsonProcessingException e) {

			e.printStackTrace();
		} catch (MalformedURLException e) {

			e.printStackTrace();
		} catch (IOException e) {

			e.printStackTrace();
		}
		return result;
	}
}